A Mystery of Medieval Ireland - Christmas, 1509. Mara, the investigating judge of the Burren, has accepted the offer of marriage made by King Turlough. But on the eve of the marriage festivities, a man kneeling in prayer in the abbey church is violently murdered. Who could have planned to kill the king? Cut off from the outside world by heavy snow, Mara must act quickly to catch the assassin before a second death occurs.